Uplink signal sending and receiving method, and apparatus

Abstract

An uplink signal sending and receiving method includes that a first communication apparatus obtains a first timing advance (TA) change rate, and sends an uplink signal in a plurality of first time periods. There is a first time interval between the plurality of first time periods to compensate for a time synchronization drift. A length of the first time interval and a location of the first time interval between the plurality of first time periods are determined based on the first TA change rate, and the first TA change rate is a TA change rate in a communication process of the first communication apparatus.

What is claimed is: 
     
       1. A method implemented by a first communication apparatus, wherein the method comprises:
 obtaining a first timing advance (TA) change rate, wherein the first TA change rate is in a communication process of the first communication apparatus; and 
 sending an uplink signal in a plurality of first time periods, 
 wherein there is a first time interval between the first time periods, 
 wherein a first length of the first time interval and a first location of the first time interval are based on the first TA change rate, 
 wherein the first length and a second location of the first time interval between a plurality of third time periods are based on a second time interval and the first TA change rate, wherein the second time interval is between a plurality of second time periods in which a second communication apparatus receives the uplink signal, wherein a second time period between every two adjacent first time intervals is one third time period, and wherein a fourth time period before an initial first time interval and a fifth time period after a last first time interval each are one third time period. 
 
     
     
       2. The method of  claim 1 , further comprising:
 skipping performing uplink sending in the first time interval; or 
 sending a cyclic suffix (CS) of a signal in the first time interval. 
 
     
     
       3. The method of  claim 1 , further comprising skipping performing uplink sending in a third time interval between the first time periods, wherein the third time interval is for receiving system information of the second communication apparatus, wherein a first duration of the third time interval is the same as a second duration in which the second communication apparatus sends the system information, and wherein a second length of the third time interval is greater than or equal to a third length of a time domain resource of the system information. 
     
     
       4. The method of  claim 1 , wherein obtaining the first TA change rate comprises:
 determining the first TA change rate based on geographical location information of the first communication apparatus and location information of the second communication apparatus; or 
 receiving the first TA change rate from the second communication apparatus. 
 
     
     
       5. The method of  claim 1 , wherein the first length is greater than or equal to a TA change amount in the communication process in a sixth time period that is before the first time interval and adjacent to the first time interval. 
     
     
       6. The method of  claim 1 , wherein the first time interval is a difference between the second time interval and a sixth time interval when the first TA change rate is positive, wherein the first time interval is a sum of the second time interval and a seventh time interval when the first TA change rate is negative, and wherein the sixth time interval or the seventh time interval is based on the first TA change rate. 
     
     
       7. The method of  claim 1 , wherein a first quantity of third time periods is the same as a second quantity of the second time periods, and wherein the second location is the same as a third location of the second time interval. 
     
     
       8. The method of  claim 7 , further comprising:
 receiving, from the second communication apparatus, first indication information indicating a third length of the second time interval and the third location or determining the third length and the third location according to a protocol specification; and 
 determining the first length of the first time interval and the second location based on the third length, the third location, and the first TA change rate. 
 
     
     
       9. The method of  claim 8 , further comprising:
 receiving, from the second communication apparatus, second indication information indicating a first index, wherein the first index indicates a fourth length of a fourth time interval and a fourth location of the fourth time interval between the plurality of first time periods; and 
 determining that the fourth length corresponding to the first index and the fourth location are respectively the first length and the first location. 
 
     
     
       10. The method of  claim 1 , further comprising:
 storing a correspondence among the TA change rate, a length of a time interval, and a location of the time interval between the plurality of first time periods; and 
 determining the first length and the location of the first time interval from the correspondence based on the first TA change rate. 
 
     
     
       11. The method of  claim 1 , wherein the uplink signal comprises a repeated signal. 
     
     
       12. The method of  claim 1 , wherein the first time interval occurs periodically, and wherein the method further comprises determining the first location based on a duration of the first time interval. 
     
     
       13. The method of  claim 1 , wherein the uplink signal is a preamble sequence or uplink data. 
     
     
       14. The method of  claim 1 , wherein each of the first time periods is one or more slots, one or more subframes, or a duration for sending one or more preamble sequences. 
     
     
       15. The method of  claim 1 , further comprising determining the first length and the first location based on the first TA change rate and a type of the uplink signal. 
     
     
       16. The method of  claim 1 , further comprising:
 determining the first location; and 
 calculating the first length based on the first TA change rate. 
 
     
     
       17. A first communication apparatus, comprising:
 a processor configured to obtain a first timing advance (TA) change rate, wherein the first TA change rate is in a communication process of the first communication apparatus; and 
 a transceiver coupled to the processor and configured to send an uplink signal in a plurality of first time periods, 
 wherein there is a first time interval between the plurality of first time periods, 
 wherein a length of the first time interval and a first location of the first time interval are based on the first TA change rate, 
 wherein the length and a second location of the first time interval between a plurality of third time periods are based on a second time interval and the first TA change rate, wherein the second time interval is between a plurality of second time periods in which a second communication apparatus receives the uplink signal, wherein a second time period between every two adjacent first time intervals is one third time period, and wherein a fourth time period before an initial first time interval and a fifth time period after a last first time interval each are one third time period. 
 
     
     
       18. The first communication apparatus of  claim 17 , wherein the processor is further configured to skip performing uplink sending in the first time interval, or the transceiver is further configured to send a cyclic suffix (CS) of a signal in the first time interval. 
     
     
       19. A computer program product comprising computer-executable instructions that are stored on a non-transitory computer-readable storage medium and that, when executed by a processor, cause a first communication apparatus to:
 obtain a first timing advance (TA) change rate, wherein the first TA change rate is in a communication process of the first communication apparatus; and 
 send an uplink signal in a plurality of first time periods, 
 wherein there is a first time interval between the first time periods, 
 wherein a first length of the first time interval and a first location of the first time interval are based on the first TA change rate, 
 wherein the first length and a second location of the first time interval between a plurality of third time periods are based on a second time interval and the first TA change rate, wherein the second time interval is between a plurality of second time periods in which a second communication apparatus receives the uplink signal, wherein a second time period between every two adjacent first time intervals is one third time period, and wherein a fourth time period before an initial first time interval and a fifth time period after a last first time interval each are one third time period.